Chemistry LibreTexts - Protein Folding and Prions
Tulane University - The Process of Protein Folding
Excellent basic discussion of the fundamentals.
Wikipedia - Folding funnelTulane University - The Process of Protein Folding
Combines a good overview with a few advanced perspectives. This is an important subject for the MCAT.
WikiBooks - Structural Biochemistry/Proteins/Protein Folding ProblemThis is a great discussion of the big questions in protein folding. Extremely useful.
Chemistry LibreTexts - Protein Folding in the Endoplasmic ReticulumTopic Resources
figures for classroom presentation